2006 GMC Yukon Owner's Manual - Page 166

Hazard Warning Flashers Your hazard warning flashers let you warn others. They also let police know you have a problem. Your front and rear turn signal lamps will flash on and off. The hazard warning flasher button is located on top of the steering column. Other Warning Devices If you carry reflective triangles, you can set them up at the side of the road about 300 feet (100 m) behind your vehicle. Horn To sound the horn, press the center pad on the steering wheel. Tilt Wheel Your hazard warning flashers work no matter what position your key is in, and even if the key is not in the ignition. Press the button to make the front and rear turn signal lamps flash on and off. Press the button again to turn the flashers off. When the hazard warning flashers are on, your turn signals will not work. Your vehicle is equipped with a tilt wheel, it will allow you to adjust the steering wheel before you drive. You can raise it to the highest level to give your legs more room when you exit and enter your vehicle. 3-6